His arm wraps around Noct, clinging to his side and just lets his head drop down onto his friends shoulder. The dream hadn't finished though, there was more to it and Noct kept on talking until Prompto eventually started to run his hand up and down Noct's arm.

Though when Noct got the worst part... Prompto actually frowned.

"I... that's creepy, but I get your dad and Luna... But why would he have the others there?" Why Nyx? And why the hell that old Aldercapt guy? What reason would those two be there, he didn't think either had much of a connection to Noct. At least not a connection that would cause him pain. The other two would have hurt him... "That's a sucky dream. I think we're gonna have to stop eatin weird stuff before bed."